Assigstor to federal telegraph



R. R. BEAL.

WIRELESS TELEGRAPHY.

APPLICATION FILED JULY 28. m5.

1,320,525. Patented Nov. 4, 1919.

will

z I F IN VEN TOR. ITNESSES: W 5 7f? I? 55/74,

, iy i. BY W A449 ATTORNEYS.

RALPH 1a: ZBEAIi, or PALO ALTO, CALIFORNIA, .essrenon'ro m nim TELEGRAPH COMPANY, or SAN FRANCISCO, CALIFORNIA, A oonronarloiv or CALIFORNIA WIRELESS TELEGRAIHY.

Specification of Letters Patent.

Patented Nov. 4, 1919.

Application filed July 28, 1815. Serial No. 42,298.

T all whom it may concern;

Be it known that I, RALPH R. Been, a citizen of the United States, and a resident of Palo Alto, county of Santa Clara, State have invented certain new specification.

The invention relates to a receiving systhe operation of the invention.

Fig. 3 is a diagrammatic representation .of

a receiving circuit including thedevice'of a "smooth surface-a the wire andthefiee endthe present invention.

The frequency of the OSCllliLtiOIIS in a wirecontinu- 1 less telegraphy system em loyin ous undamped waves is so t at it can; not be utilized to operate electromagnetic instruments such as telephone and produce audible signals. The frequencyfof the oscillations is above the limits'bfaujdlbility and to Be quency mustbe reduced to within these limits. This h"s'-"be'en accomplished herebefore by arranging an interrupter and a The wire holding support 7 and the wheel 6 cdndenser in the-receiving circuit, the conreceived by the ear thegfr'e denser being charged by the high frequency oscillations during the time that the interrupter is closed,- and discharging with a surge through the telephone receivers when the interrupter is open. e

In accordance with my invention I convert'the high frequency current into a current of audible frequency and operate the receivers by this low frequency current.

tem for wireless communication and especl- By opening-and closing the receiving cirally to a device adapted to. beused in said cult at a frequency which may be made to system. I approach synchronism with the frequency of An object of the invention is to provide the received oscillations, a low frequency an apparatus by means of which'continuous' current is obtained which flows through the electrical oscillations of high frequency are telephones.- The regularity ofthis low freconverted into continuous oscillations of, quency' current givesa musical note to the lower frequency. I received signals, and the nearer that the The invention possesses other objects and frequency of interruption approaches the advantageous features, which, with the forefrequency of the incomlPg Wave/$51118 IOWQI going, will be set forth at length inthe 111'bethe note. In Ifig. 2 I have shown following description, where I shall outm l ll h Inc ming undamped line in full that form of the invention which O t n Of h gh frequency 2. The fre- I have selected for illustration in the drawqilllencyfofimt rr p nissomewhat less than ings accompanying and forming part of the frequency of the pscillations, resulting present specification. In the drawings, 1. in" a current,-3, :wh1ch is of much lower frehave shown only one specific form of my q f ?y,thanj that "of. the incoming Waves. generic invention, but it is to be ,underlfllh ln lfrllp fifl 9f the r i o prod ce stood that I do not limit myself to-such }h1S; OW ,L 'q}19nGy SO ained by a Vibratform, because my invention maybe em g ouncm k-jconductor which is mainbodied in a multiplieity'of forms,'each be i 'e q .in motion at a constant ing a species of my said invention. It -thepresent instance the also to be understood that by the claims.s1'1cj--= wire 4 engagin the surceeding the descriptionof my invention, I ap :fi wvingpolishe surface desire to cover the invention in whatever lsting 'oftiref .eripheral surface of the form it may be embodied.- 7 Wheel'ti; ,The1Wire ssuitaibiyheld in a sup- Referring to'said drawings: 1 P 11? arrangedatttheside.of the Wheel, pref- Figure 1 is a. perspective zview 'of-fgonei era'bly atyside, gtoward which the wheel form of the device of my invention; ,f H hat, the" smooth movingsurface 5 Fig. 2 is a diagrammatic;illustration ls-in eon t. with jthe end of the wire. I

"the preferable construction the main portion oft-how e li in-afplanesubstantially parjallell plan ofrgtangency with the t hefpoint of contact with I r f the' Wire is bent toward.theisiirfacefiso the end of the wire approachesperpendicularity with the surface at th mt-Iofcontact. As the wheel rotates, ewirefbounces and moves out of and into-contact with .the Wheel at a high and uniform-rate. I The length and the physical aime sions, and properties of the 'bratepat the vproper frequency to produce the desired resultant low frequency current.

wire .ares'o adjusted-that the wire will viare preferably insulated from each other by mounting both on a block 8 of suitable insulating material. The Wheel 6 is preferably driven by and insulated from a small electric block 8.

The device, indicated at'12 in Fig. 3, is placed in series with the telephone receivers 13 in the-secondary circuit 14 of a properly tuned wireless receiving set, of which 15 is the primary or open circuit, one terminal being connected to the wire and the other to the support for the wheel. The high frequency current is converted into a current of lower frequency by the device,- and this low frequency current is ing the telephones.

It is not necessary that the frequency of the interruption be near synchronism with the frequency of the received oscillation, and it may be varied to produce any desired note in the telephones.

I claim:

1. In a receiving system for wireless telegraphy receiving continuous oscillations, a receiving circuit, and means for regularly interrupting the quency less thanthat of said continuous 0scillations comprising an element having a smooth surface, a resilient conductor bent to engage said surface and means for moving the surface against the conductor, whereby said conductor is caused to vibrate and make and break contact with said surface.

2. In a receiving system for wireless temotor 9 mounted on the same effective in operatreceiving circuit at a fre-.

legraphy receiving continuous oscillations, a receiving circuit, and means for regularly interrupting the receiving circuit at a. frequency approaching synchronism with the ing the wheel against said conductor whereby the conductor is caused to bounce and make and break contact with said wheel, said wheel and conductor being otherwise insulated from each. other.

3. In a receiving system for Wireless telegraphy receiving continuous oscillations, a receiving circuit, and means for regularly interrupting the receiving circuit at a frequencyapproaching synchronism .with the frequency of the oscillations co )rising a wheel having a smooth surface, a entwi re contacting with said wheel, the body of the Wire lying in a plane parallel to aplane tangent'ial to the wheel at the point of contact ofthe wire, the contacting end of the wire being bent to engage the surface of the wheel at an angle, and means for rotating said wheel toward said wire whereby the wire is caused to bounce at a regular frequency.

" In testimony whereof, I- have hereunto set my hand at San Francisco, California, this 12th day of May, 1915. i

, RALPH R. BEAL.

In Presence of' i i i H. G. PROST. 

